With any incubator, it is trial and error. I have had some that were supposed to be great and they literally were junk. I've had others that were supposed to be low end that did a better job than the more expensive ones.
I would check out reviews and see what everyone else is saying about this particular model. I think this one is discontinued. You may want to see why, but if you can get it for cheap, I would probably get it. Set it up and run it to see how well it maintains temps and to see if there are any fluctuations. I would want to do that before putting any eggs in it.